Shuttle X

good

That were 2 fun coasters
They were 2 typical Vekoma's, they provided some roughness
Shuttle XI: It is different from the original Boomerang, good.
The Sea Serpent roll is a bit rough and my experience with Sea Serpent rolls is that they aren' t.
The turn is okay, the interaction with Shuttle XII is fun.
Looping was good
Shuttle XII:
The Sea Serpent roll is too tight, if you spread it out more it will be more enjoyable.
Turn is good, interaction with Shuttle XI
Loop is good
When both coasters go backwards, they don' t duel.
(I don' t know if it is meant to do that, probably yes?)
You could change the speed from the lifthills, so they can duel both forwards and backwards
Overall: Good coaster, I liked it. And about the queue: The queue line with supports is well made and the sign looks good.